AFONNO Ultrasonic Pest Repeller, Pest Reject, Mosquito Repellent, Insect Repellent, Mosquito Repellent, Mosquito Zapper, Insect Killer, Pest Control Ultrasonic Repellent (2P) CHILD & PET FRIENDLY: This Pest Repeller sends low frequency ultrasonic sound waves that damage pests nervous systems. The ultrasonic waves only target pests providing the safest environment for your children and pets. ECO-FRIENDLY: This pest repeller is environmentally friendly, safe and harmless to human and pets. It is only audible to pests and no bad smell. Humans and pets wont be affected. HIGH PRICE RATIO: Save money and time. Simply plug it into an outlet, and then it will work. Enjoy the pest-free house and free from cleaning up the dead pests. SLEEP NIGHTLIGHT: Our portable Ultrasonic Pest Repeller installed a RED light that is proven not to affect your sleep. It could help you have a good night away from the pests. The light can be controlled by touch switch on the side. LARDE COVERAGE AREA: This covers indoor area up to 1600 SQ FT. All you need is to plug in repeller each room and power it on, then you can say goodbye to the disgusting pests.